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dc2019q - VeryAndroidoso reversing android

by anton00b

This was a jeopardy challenge, part of dc2019q. (CTFtime)

Points: 139
Was solved by: 33 teams

Description

With the right flag, it will print 'Success!' on the screen and on logcat. Good Luck!

Reverse engineering and Frida is a valid way to solve this challenge, and many teams opted to do this.


However, this challenge is also solvable using angr's symbolic execution -- see the author's writeup for hints on this route.

line_weight ooo.defcon2019.quals.veryandroidoso.apk

Hints

None yet :(
If you wish, you can contribute some.

There's an author-recommended writeup.